BUG: #23 seems to have broken etl jobs with a local dev deployment

[delocalizer]

My setup

Using gen3-helm to deploy to a kind cluster on my laptop.

Current master gen3-spark: https://quay.io/repository/cdis/gen3-spark/manifest/sha256:1e235e924d23df8db32e88fde6a6a228a41ca1b8070fd3c6ee933c96c2ad3275
Current stable gen3-spark: https://quay.io/repository/cdis/gen3-spark/manifest/sha256:f9ab04742d907bf8f02b8bc3add6e6eb53637739134fdd9b57c6eaf5a9faa4e7

What I observe

If I use the default gen3-spark image in values.yaml:

etl:
  image:
    spark:
      repository: quay.io/cdis/gen3-spark
      tag: master

and try to create an etl job, I see this in gen3-spark pod logs:

/bin/bash: line 5: python: command not found
...
ERROR: Cannot set priority of namenode

and etl jobs always fail, with no spark service on port 9000.

If I revert to stable tag, the gen3-spark pod starts fine and etl jobs succeed.